The project is built to demonstrate working of LM35 temperature sensor interfaced with through ADC The LM35 series are precision. LM35 is a 3 pin temperature sensor, which is pretty accurate in detecting Interfacing LCD in Temperature Indicator using and LM SENSOR INTERFACING: Temperature Sensor (LM35) INTERFACING with PIC18F Aditi Nandi-vtu, Leya Gopal,-vtu, Degala Vani-vtu

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Temperature sensor(lm35) interfacing with 8051

VDD – Supply voltage Pin 2: Finally the complete working process, its characteristics, applications will be discussed in this paper. This value of temperature is then display on the LCD 20 by 4.

They are data register and command register. The extra part required for this project like LCD and the LM35 temperature sensor are installed in the expansion board. There are two very important registers inside the LCD.

Temperature sensor(lm35) interfacing with | MechaTerrain

From ADC these digital signals are sent to Microcontroller which displays the temperature of that environment. After this part tenperature microcontroller will need certain routines so that it can convert this 8-bit data ADDH register for the ADC of the micro to a specific Temperature varying from 0oC to oC. So the maximum voltage that the LM35 will give is 1V and the maximum voltage that the microcontroller will input is of 2. Keep up interfafing good work!

Digital Thermometer using LM35 and Microcontroller

Data pins are connected to port 1 of microcontroller. C Serial Port Example. Then this temperature is converted into ascii form which is suitable for displaying. Input to its equivalent binary output. The command is copied to port 0 of microcontroller. Please help us ASAP as it is required for our academic project. Skip to main content. As explained the microcontroller will get the analogue voltage, which is generated, from the LM35 plus the gain block.

  ISBP 2007 PDF

The LM35 comes already calibrated hence requires no external calibration.

The problem should be with your hardware, check the contrast pin of the LCD. Remember me on this computer. What is the problem? The base board has all the basic circuit to run the PIC. Enter the email address you signed up with and we’ll email you a reset link.

If any change then the value will be given to the decoder. The full 8 bits of resolution are therefore applied over this reduced analog input voltage range.

See Connection Diagram below:. Following formula is used to calculate output voltage: It is defined as exchange of Input or output data between sensor and PIC microcontroller or other devices. LM35 gives analog reading and microcontroller process digital data so we have to use a midway converter from Analog to Digital i. Low cost is temperture by trimming and calibration at the wafer level. Next we have to define some wtih which are used in the program.

An example of the use of an adjusted reference voltage is to accommodate a reduced span—or dynamic voltage range of the analog input voltage. Sometimes people find it difficult to read temperature from analog thermometer because of fluctuations. The LM35 would give a total output voltage 1v since every degree has a value of 10mv and so a range of 0 to 1V.


The table below shows the comparison of family members. Different sensors available for PIC It outputs 10mV for each degree sensir Celsius temperature.

Converting Integer to Characters in Ansi C. After a specified time delay, next cycle starts. The main objective of this paper is to the complete overview of sensor interfacing i.

This process is repeated after specified interval. The code is split into small meaningful chunks and explained below. Help Center Find new research papers in: It can be used with single power supplies, or with plus and minus supplies.

These double checks enables to remove errors when you do it on a hardware. It is pin number 2 on the 40 pin package. This has been achieved in the design of the IC as shown in Figure.

8051 – ADC0804 Interfacing

For example, a printer typically connects to a computer via a Wwith interface. Hey Really well written and described. AD and display the result of a temperature on LCD.

It includes different sensors, basic block diagram of sensor interfacing. RW is made low for write operation. Ball on Plate control. It can be used with single power supplies, or with dual supplies. RS is made low for command write. Major problems arises due to improper soldering, solder jumps and loose joints.